/* =============================================================================
   PromptBase — design system v2
   A dense, credible developer-reference aesthetic. Near-monochrome, sharp borders,
   one restrained accent, real brand logos, monospace metadata. No gradients, no slop.
   Type: IBM Plex Sans (UI/headings) · IBM Plex Mono (code, labels, metadata).
   ========================================================================== */

:root {
  --paper:        #ffffff;
  --paper-2:      #f7f8fa;
  --surface:      #ffffff;
  --surface-2:    #f4f5f7;
  --surface-3:    #eef0f3;
  --ink:          #16181d;
  --ink-2:        #4a4f57;
  --ink-3:        #767b85;
  --ink-4:        #9aa0aa;
  --line:         #e7e9ee;
  --line-2:       #d7dae1;
  --accent:       #2f5fe0;
  --accent-2:     #2247bd;
  --accent-soft:  #eef2fd;
  --accent-ink:   #ffffff;
  --good:         #1a7f47;
  --good-soft:    #e7f4ec;
  --warn:         #9a6a00;
  --bad:          #c2362b;
  --bad-soft:     #fbecea;
  --shadow:       0 1px 2px rgba(16,18,23,.04), 0 4px 16px -8px rgba(16,18,23,.12);
  --shadow-lg:    0 16px 48px -20px rgba(16,18,23,.28);
  --radius:       10px;
  --radius-sm:    7px;
  --radius-lg:    16px;
  --maxw:         1200px;
  --readw:        700px;

  --font-sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --font-disp: var(--font-sans);
}

[data-theme="dark"] {
  --paper:        #0c0d10;
  --paper-2:      #111318;
  --surface:      #141619;
  --surface-2:    #1a1d22;
  --surface-3:    #21242a;
  --ink:          #e8eaee;
  --ink-2:        #aab1bd;
  --ink-3:        #7c828d;
  --ink-4:        #5c626c;
  --line:         #23262c;
  --line-2:       #30343b;
  --accent:       #6f9bff;
  --accent-2:     #8db0ff;
  --accent-soft:  #16203a;
  --accent-ink:   #0c0d10;
  --good:         #4cc079;
  --good-soft:    #11241a;
  --warn:         #d6a93f;
  --bad:          #f0796a;
  --bad-soft:     #2a1714;
  --shadow:       0 1px 2px rgba(0,0,0,.4), 0 8px 24px -14px rgba(0,0,0,.6);
  --shadow-lg:    0 24px 60px -28px rgba(0,0,0,.75);
}

/* ---- Reset -------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
  font-size: 15px;
  letter-spacing: -0.006em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
::selection { background: var(--accent); color: var(--accent-ink); }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }
.flow { flex: 1 0 auto; }
.muted { color: var(--ink-3); }
.center { text-align: center; }
.mono { font-family: var(--font-mono); }

/* =============================================================================
   Brand marks (logos)
   ========================================================================== */
.bmark { display: inline-grid; place-items: center; flex: none; border-radius: 8px;
  border: 1px solid var(--line); background: var(--surface); overflow: hidden; }
.bmark--logo { padding: 6px; color: var(--ink); }
.bmark--logo svg { width: 100%; height: 100%; fill: currentColor; }
.bmark--letter { font-family: var(--font-mono); font-weight: 600; color: var(--ink-2);
  background: var(--surface-2); letter-spacing: -0.02em; }

/* =============================================================================
   Header
   ========================================================================== */
.site-header { position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line); }
.site-header__bar { display: flex; align-items: center; gap: 20px; height: 58px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; }
.brand__mark { width: 26px; height: 26px; border-radius: 7px; background: var(--ink); color: var(--paper);
  display: grid; place-items: center; font-weight: 700; font-size: 15px; letter-spacing: -0.04em; }
[data-theme="dark"] .brand__mark { background: var(--accent); color: var(--accent-ink); }
.brand__name { font-size: 1.02rem; font-weight: 600; letter-spacing: -0.02em; }
.brand__name b { color: var(--accent); font-weight: 600; }

.nav { display: flex; align-items: center; gap: 2px; margin-left: 8px; }
.nav a { padding: 7px 11px; border-radius: 7px; color: var(--ink-2); font-size: .9rem; font-weight: 500;
  transition: background .12s, color .12s; }
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a.is-active { color: var(--ink); }
.nav a.is-active::after { content: ""; display: block; height: 2px; background: var(--accent);
  border-radius: 2px; margin-top: 5px; }
.header-spacer { flex: 1; }
.header-actions { display: flex; align-items: center; gap: 7px; }
.icon-btn { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink-2); display: grid; place-items: center; transition: .12s; }
.icon-btn:hover { border-color: var(--line-2); color: var(--ink); background: var(--surface-2); }
.icon-btn svg { width: 17px; height: 17px; }
.theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }
.nav-toggle { display: none; }

/* =============================================================================
   Buttons
   ========================================================================== */
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 9px 15px; border-radius: 8px;
  border: 1px solid transparent; font-weight: 600; font-size: .9rem; letter-spacing: -0.01em;
  transition: background .12s, border-color .12s, color .12s; white-space: nowrap; }
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: var(--accent-2); }
.btn--ghost { background: var(--surface); border-color: var(--line-2); color: var(--ink); }
.btn--ghost:hover { background: var(--surface-2); border-color: var(--ink-4); }
.btn--ink { background: var(--ink); color: var(--paper); }
.btn--ink:hover { opacity: .88; }
.btn--sm { padding: 6px 11px; font-size: .82rem; border-radius: 7px; }
.btn--block { width: 100%; justify-content: center; }
.btn svg { width: 16px; height: 16px; }

/* =============================================================================
   Generic bits
   ========================================================================== */
.kicker { font-family: var(--font-mono); font-size: .72rem; font-weight: 500; letter-spacing: .14em;
  text-transform: uppercase; color: var(--accent); }
.badge { display: inline-flex; align-items: center; gap: 5px; font-family: var(--font-mono);
  font-size: .69rem; font-weight: 500; letter-spacing: .03em; text-transform: uppercase;
  padding: 3px 8px; border-radius: 6px; border: 1px solid var(--line-2); color: var(--ink-2); background: var(--surface); }
.badge--accent { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); background: var(--accent-soft); }
.badge--official { color: var(--good); border-color: color-mix(in srgb, var(--good) 35%, var(--line)); background: var(--good-soft); }
.tag { display: inline-block; font-family: var(--font-mono); font-size: .74rem; color: var(--ink-2);
  padding: 3px 8px; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--line); transition: .12s; }
a.tag:hover { color: var(--accent); border-color: var(--line-2); }

.link-arrow { color: var(--accent); font-weight: 600; font-size: .9rem; display: inline-flex; align-items: center; gap: 5px; }
.link-arrow:hover { gap: 8px; }

.flash-stack { position: fixed; top: 72px; right: 24px; z-index: 80; display: grid; gap: 9px; max-width: 360px; }
.flash { display: flex; align-items: flex-start; gap: 11px; padding: 12px 14px; border-radius: 9px;
  box-shadow: var(--shadow-lg); border: 1px solid var(--line); background: var(--surface); font-size: .88rem; animation: slidein .25s ease; }
.flash--success { border-left: 3px solid var(--good); }
.flash--error   { border-left: 3px solid var(--bad); }
.flash--info    { border-left: 3px solid var(--accent); }
.flash__x { background: none; border: none; color: var(--ink-3); font-size: 1.1rem; line-height: 1; }
@keyframes slidein { from { opacity: 0; transform: translateX(10px); } }

.callout { display: flex; gap: 12px; padding: 14px 16px; border-radius: var(--radius); border: 1px solid var(--line-2);
  background: var(--surface-2); font-size: .9rem; }
.callout svg { width: 19px; height: 19px; color: var(--accent); flex: none; }

/* =============================================================================
   Hero / home
   ========================================================================== */
.hero { padding: 76px 0 40px; border-bottom: 1px solid var(--line); position: relative; }
.hero__inner { max-width: 820px; }
.hero h1 { font-weight: 600; letter-spacing: -0.035em; font-size: clamp(2.3rem, 5.2vw, 3.6rem);
  line-height: 1.04; margin-top: 16px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero__lede { font-size: 1.12rem; color: var(--ink-2); max-width: 600px; margin-top: 18px; letter-spacing: -0.01em; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.hero__logos { display: flex; align-items: center; gap: 22px; margin-top: 40px; flex-wrap: wrap; opacity: .85; }
.hero__logos .lbl { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-4); }
.hero__logos .bmark { border: none; background: none; width: 26px; height: 26px; color: var(--ink-3); }
.hero__logos .bmark--logo { padding: 0; }
.hero__logos .bmark:hover { color: var(--ink); }

.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; margin-top: 44px; background: var(--surface); }
.hero-stats .s { padding: 18px 20px; border-right: 1px solid var(--line); }
.hero-stats .s:last-child { border-right: none; }
.hero-stats .n { font-size: 1.7rem; font-weight: 600; letter-spacing: -0.03em; }
.hero-stats .l { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin-top: 3px; }

.searchbar { display: flex; align-items: center; gap: 9px; background: var(--surface); border: 1px solid var(--line-2);
  border-radius: 10px; padding: 4px 4px 4px 14px; box-shadow: var(--shadow); transition: border-color .12s, box-shadow .12s; }
.searchbar:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.searchbar svg { width: 17px; height: 17px; color: var(--ink-3); flex: none; }
.searchbar input { flex: 1; border: none; background: none; outline: none; padding: 10px 0; font-size: .95rem; }

/* =============================================================================
   Sections
   ========================================================================== */
.section { padding: 52px 0; }
.section__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 26px; flex-wrap: wrap; }
.section__head h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); font-weight: 600; letter-spacing: -0.025em; }
.section__head p { color: var(--ink-3); margin-top: 5px; max-width: 540px; font-size: .95rem; }

/* category list — table-like, dense */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.cat-card { display: block; padding: 18px 20px; background: var(--surface); transition: background .12s; position: relative; }
.cat-card:hover { background: var(--surface-2); }
.cat-card__top { display: flex; align-items: center; justify-content: space-between; }
.cat-card h3 { font-size: 1rem; font-weight: 600; letter-spacing: -0.015em; }
.cat-card__count { font-family: var(--font-mono); font-size: .74rem; color: var(--accent); }
.cat-card p { font-size: .85rem; color: var(--ink-3); margin-top: 6px; line-height: 1.45; }

/* =============================================================================
   Prompt cards & grid
   ========================================================================== */
.prompt-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 14px; }
.pcard { display: flex; flex-direction: column; padding: 18px; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--surface); transition: border-color .12s, box-shadow .12s; height: 100%; }
.pcard:hover { border-color: var(--line-2); box-shadow: var(--shadow); }
.pcard__top { display: flex; align-items: center; gap: 10px; margin-bottom: 13px; }
.pcard__id { min-width: 0; }
.pcard__tool { font-weight: 600; font-size: .88rem; line-height: 1.15; letter-spacing: -0.01em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pcard__type { font-family: var(--font-mono); font-size: .67rem; color: var(--ink-3); letter-spacing: .05em; text-transform: uppercase; margin-top: 1px; }
.pcard__verified { margin-left: auto; color: var(--good); display: grid; place-items: center; }
.pcard__verified svg { width: 17px; height: 17px; }
.pcard__titlelink { display: block; }
.pcard__title { font-size: 1.06rem; font-weight: 600; letter-spacing: -0.02em; line-height: 1.25; }
.pcard__titlelink:hover .pcard__title { color: var(--accent); }
.pcard__summary { font-size: .87rem; color: var(--ink-2); margin-top: 7px; flex: 1; line-height: 1.5; }
.pcard__tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 13px; }
.pcard__foot { display: flex; align-items: center; gap: 13px; margin-top: 14px; padding-top: 12px;
  border-top: 1px solid var(--line); font-family: var(--font-mono); font-size: .73rem; color: var(--ink-3); }
.pcard__foot .m { display: inline-flex; align-items: center; gap: 4px; }
.pcard__foot svg { width: 13px; height: 13px; }
.pcard__foot .spacer { flex: 1; }

/* =============================================================================
   Browse
   ========================================================================== */
.browse { display: grid; grid-template-columns: 232px 1fr; gap: 34px; align-items: start; padding: 32px 0 80px; }
.filters { position: sticky; top: 78px; }
.filters h4 { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px; }
.filters__group + .filters__group { margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
.filter-link { display: flex; justify-content: space-between; align-items: center; padding: 6px 9px; border-radius: 7px;
  color: var(--ink-2); font-size: .88rem; transition: .12s; }
.filter-link:hover { background: var(--surface-2); color: var(--ink); }
.filter-link.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.filter-link .c { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-3); }
.filter-link.is-active .c { color: var(--accent); }

.browse__main { min-width: 0; }
.browse__bar { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.browse__bar .count { font-family: var(--font-mono); font-size: .8rem; color: var(--ink-3); }
.select { padding: 7px 11px; border-radius: 8px; border: 1px solid var(--line-2); background: var(--surface); font-size: .85rem; }

.pagination { display: flex; gap: 5px; justify-content: center; margin-top: 40px; }
.pagination a, .pagination span { min-width: 38px; height: 38px; display: grid; place-items: center; padding: 0 10px;
  border-radius: 8px; border: 1px solid var(--line); font-size: .88rem; color: var(--ink-2); font-family: var(--font-mono); }
.pagination a:hover { border-color: var(--line-2); color: var(--ink); }
.pagination .is-active { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.pagination .is-disabled { opacity: .4; pointer-events: none; }

.page-head { padding: 34px 0 6px; }
.page-head h1 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); font-weight: 600; letter-spacing: -0.03em; }
.page-head p { color: var(--ink-3); max-width: 640px; margin-top: 7px; font-size: .98rem; }

/* =============================================================================
   Prompt detail
   ========================================================================== */
.detail { display: grid; grid-template-columns: 1fr 296px; gap: 42px; align-items: start; padding: 30px 0 88px; }
.detail__main { min-width: 0; }
.crumbs { font-family: var(--font-mono); font-size: .76rem; color: var(--ink-3); margin-bottom: 18px; }
.crumbs a:hover { color: var(--accent); }
.detail__head { display: flex; align-items: flex-start; gap: 15px; }
.detail h1 { font-size: clamp(1.7rem, 3.6vw, 2.4rem); font-weight: 600; letter-spacing: -0.03em; line-height: 1.1; }
.detail__meta-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 14px 0 4px; }
.detail__summary { font-size: 1.05rem; color: var(--ink-2); max-width: var(--readw); margin-top: 14px; line-height: 1.55; }

.codeblock { position: relative; margin-top: 24px; border: 1px solid var(--line-2); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.codeblock__bar { display: flex; align-items: center; gap: 9px; padding: 9px 13px; border-bottom: 1px solid var(--line);
  background: var(--surface-2); font-family: var(--font-mono); font-size: .74rem; color: var(--ink-3); }
.codeblock__bar .lbl { display: inline-flex; align-items: center; gap: 7px; }
.codeblock__bar .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line-2); }
.codeblock__bar .spacer { flex: 1; }
.copy-btn { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 6px;
  border: 1px solid var(--line-2); background: var(--surface); color: var(--ink-2); font-size: .74rem; font-family: var(--font-mono); transition: .12s; }
.copy-btn:hover { color: var(--ink); border-color: var(--ink-4); }
.copy-btn.copied { color: var(--good); border-color: var(--good); }
.codeblock pre { margin: 0; padding: 18px; overflow-x: auto; max-height: 640px; }
.codeblock code { font-family: var(--font-mono); font-size: .82rem; line-height: 1.7; color: var(--ink);
  white-space: pre-wrap; word-break: break-word; }
.codeblock.is-collapsed pre { max-height: 340px; }
.codeblock__fade { position: absolute; left: 0; right: 0; bottom: 0; height: 90px;
  background: linear-gradient(transparent, var(--surface)); display: none; }
.codeblock.is-collapsed .codeblock__fade { display: block; }
.expand-btn { position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%); z-index: 2; }

.detail__side { position: sticky; top: 78px; display: grid; gap: 14px; }
.panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 16px; }
.panel h4 { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 12px; }
.kv { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; font-size: .86rem; border-bottom: 1px solid var(--line); }
.kv:last-child { border-bottom: 0; }
.kv .k { color: var(--ink-3); }
.kv .v { font-weight: 600; text-align: right; }
.vote-row { display: flex; gap: 9px; }
.vote-btn { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 11px;
  border: 1px solid var(--line-2); border-radius: 9px; background: var(--surface); font-weight: 600; font-size: .88rem; transition: .12s; }
.vote-btn:hover { border-color: var(--accent); color: var(--accent); }
.vote-btn.is-on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.vote-btn svg { width: 16px; height: 16px; }

.highlight-list { list-style: none; display: grid; gap: 9px; }
.highlight-list li { display: flex; gap: 9px; font-size: .88rem; color: var(--ink-2); line-height: 1.45; }
.highlight-list li::before { content: ""; width: 5px; height: 5px; border-radius: 1px; background: var(--accent); margin-top: 8px; flex: none; }

.comments { margin-top: 44px; padding-top: 32px; border-top: 1px solid var(--line); max-width: var(--readw); }
.comments h2 { font-size: 1.3rem; font-weight: 600; letter-spacing: -0.02em; }
.comment { display: flex; gap: 13px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.avatar { width: 36px; height: 36px; border-radius: 9px; flex: none; display: grid; place-items: center;
  color: #fff; font-weight: 600; font-size: .85rem; }
.avatar--sm { width: 28px; height: 28px; font-size: .72rem; border-radius: 7px; }
.comment__meta { font-size: .8rem; color: var(--ink-3); }
.comment__meta b { color: var(--ink); font-weight: 600; }
.comment__body { margin-top: 4px; font-size: .92rem; }
.comment-form textarea { width: 100%; min-height: 92px; padding: 13px; border-radius: 10px; border: 1px solid var(--line-2);
  background: var(--surface); resize: vertical; font-size: .92rem; }

/* =============================================================================
   Learn
   ========================================================================== */
.learn-hero { padding: 64px 0 26px; border-bottom: 1px solid var(--line); }
.learn-hero h1 { font-size: clamp(2rem, 4.4vw, 3rem); font-weight: 600; letter-spacing: -0.035em; line-height: 1.06; max-width: 760px; }
.learn-hero p { font-size: 1.1rem; color: var(--ink-2); max-width: 620px; margin-top: 16px; line-height: 1.55; }

.module { padding: 26px 0; border-top: 1px solid var(--line); }
.module:first-of-type { border-top: none; }
.module__label { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.module__label .num { font-family: var(--font-mono); color: var(--accent); font-size: .76rem; letter-spacing: .08em; }
.module__label h2 { font-size: 1.4rem; font-weight: 600; letter-spacing: -0.02em; }
.module__label p { color: var(--ink-3); font-size: .9rem; margin-top: 2px; }

.lesson-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.lesson-row { display: grid; grid-template-columns: 48px 1fr auto; gap: 16px; align-items: center; padding: 15px 18px;
  background: var(--surface); transition: background .12s; }
.lesson-row:hover { background: var(--surface-2); }
.lesson-row__n { font-family: var(--font-mono); font-size: .9rem; color: var(--ink-4); font-weight: 500; }
.lesson-row__t { font-size: 1rem; font-weight: 600; letter-spacing: -0.015em; }
.lesson-row__s { font-size: .86rem; color: var(--ink-3); margin-top: 2px; line-height: 1.4; }
.lesson-row__time { font-family: var(--font-mono); font-size: .73rem; color: var(--ink-4); white-space: nowrap; }

.article { max-width: var(--readw); margin-inline: auto; padding: 38px 0 88px; }
.article__head { margin-bottom: 28px; }
.article__head .kicker { display: block; margin-bottom: 12px; }
.article h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); font-weight: 600; letter-spacing: -0.035em; line-height: 1.08; }
.article__sub { font-size: 1.12rem; color: var(--ink-2); margin-top: 14px; line-height: 1.5; }
.article__metaline { font-family: var(--font-mono); font-size: .76rem; color: var(--ink-3); margin-top: 16px; display: flex; gap: 16px; }

.prose { font-size: 1.02rem; line-height: 1.72; color: var(--ink); }
.prose > * + * { margin-top: 1.05em; }
.prose h2 { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.025em; margin-top: 1.8em; line-height: 1.2; }
.prose h3 { font-size: 1.15rem; font-weight: 600; margin-top: 1.5em; letter-spacing: -0.01em; }
.prose ul, .prose ol { padding-left: 1.25em; }
.prose li + li { margin-top: .4em; }
.prose li::marker { color: var(--ink-4); }
.prose blockquote { border-left: 3px solid var(--accent); padding: 2px 0 2px 18px; color: var(--ink-2); }
.prose strong { font-weight: 600; }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose code { font-family: var(--font-mono); font-size: .85em; background: var(--surface-2); padding: 2px 6px; border-radius: 5px; border: 1px solid var(--line); }
.prose pre { background: var(--surface); border: 1px solid var(--line-2); border-radius: var(--radius); padding: 16px; overflow-x: auto; }
.prose pre code { background: none; border: none; padding: 0; font-size: .84rem; line-height: 1.65; white-space: pre; }
.prose table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.prose th, .prose td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); }
.prose th { font-family: var(--font-mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); }

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 22px 0; }
.compare__col { border: 1px solid var(--line-2); border-radius: var(--radius); overflow: hidden; }
.compare__col h4 { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; padding: 9px 13px; border-bottom: 1px solid var(--line); }
.compare__col--bad h4 { color: var(--bad); background: var(--bad-soft); }
.compare__col--good h4 { color: var(--good); background: var(--good-soft); }
.compare__col pre { margin: 0; padding: 15px; font-family: var(--font-mono); font-size: .8rem; line-height: 1.6; white-space: pre-wrap; }
.compare__why { font-size: .9rem; color: var(--ink-2); margin-top: 9px; }

.takeaways { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin: 32px 0; }
.takeaways h3 { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.takeaways ul { list-style: none; display: grid; gap: 11px; }
.takeaways li { display: flex; gap: 11px; font-size: .96rem; }
.takeaways li svg { width: 17px; height: 17px; color: var(--good); flex: none; margin-top: 3px; }

.lesson-nav { display: flex; justify-content: space-between; gap: 14px; margin-top: 46px; padding-top: 24px; border-top: 1px solid var(--line); }
.lesson-nav a { flex: 1; padding: 15px 17px; border: 1px solid var(--line); border-radius: var(--radius); transition: .12s; }
.lesson-nav a:hover { border-color: var(--line-2); background: var(--surface-2); }
.lesson-nav .dir { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-3); }
.lesson-nav .t { font-weight: 600; margin-top: 4px; letter-spacing: -0.01em; }
.lesson-nav .next { text-align: right; }

/* =============================================================================
   Auth & forms
   ========================================================================== */
.auth { display: grid; grid-template-columns: 1.05fr .95fr; min-height: calc(100vh - 58px); }
.auth__aside { background: var(--paper-2); border-right: 1px solid var(--line); padding: 60px;
  display: flex; flex-direction: column; justify-content: space-between; }
.auth__aside .quote { font-size: 1.5rem; line-height: 1.32; max-width: 440px; letter-spacing: -0.025em; font-weight: 500; }
.auth__aside .quote span { color: var(--accent); }
.auth__aside .by { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-3); margin-top: 16px; }
.auth__aside .marks { display: flex; gap: 16px; margin-top: 24px; color: var(--ink-3); }
.auth__aside .marks .bmark { border: none; background: none; width: 24px; height: 24px; }
.auth__panel { display: flex; align-items: center; justify-content: center; padding: 44px 24px; }
.auth__form { width: 100%; max-width: 392px; }
.auth__form h1 { font-size: 1.75rem; font-weight: 600; letter-spacing: -0.03em; }
.auth__form > p { color: var(--ink-3); margin-top: 5px; margin-bottom: 24px; }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: .84rem; font-weight: 600; margin-bottom: 6px; }
.field input, .field textarea, .field select { width: 100%; padding: 11px 13px; border-radius: 9px;
  border: 1px solid var(--line-2); background: var(--surface); transition: border-color .12s, box-shadow .12s; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); outline: none; }
.field .hint { font-size: .79rem; color: var(--ink-3); margin-top: 5px; }
.field .err { font-size: .8rem; color: var(--bad); margin-top: 5px; }
.field--error input, .field--error textarea { border-color: var(--bad); }
.auth__alt { font-size: .88rem; color: var(--ink-3); margin-top: 20px; text-align: center; }
.auth__alt a { color: var(--accent); font-weight: 600; }

.form-card { max-width: 760px; margin-inline: auto; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 32px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* =============================================================================
   Profile / dashboard
   ========================================================================== */
.profile-head { display: flex; gap: 20px; align-items: center; padding: 40px 0 26px; }
.profile-head .avatar { width: 76px; height: 76px; border-radius: 16px; font-size: 1.7rem; }
.profile-head h1 { font-size: 1.9rem; font-weight: 600; letter-spacing: -0.03em; }
.profile-head .handle { font-family: var(--font-mono); color: var(--ink-3); font-size: .88rem; }
.stat-row { display: flex; gap: 26px; margin-top: 12px; }
.stat-row .s b { font-size: 1.2rem; font-weight: 600; }
.stat-row .s span { font-family: var(--font-mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-3); margin-left: 5px; }
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin: 8px 0 26px; }
.tabs a { padding: 11px 15px; font-weight: 600; font-size: .9rem; color: var(--ink-3); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs a.is-active { color: var(--ink); border-color: var(--accent); }

/* =============================================================================
   Empty / footer
   ========================================================================== */
.empty { text-align: center; padding: 64px 20px; color: var(--ink-3); }
.empty .ic { font-family: var(--font-mono); font-size: 2rem; color: var(--ink-4); }
.empty h3 { font-size: 1.25rem; color: var(--ink); margin-top: 8px; font-weight: 600; letter-spacing: -0.02em; }

.site-footer { border-top: 1px solid var(--line); padding: 50px 0 36px; margin-top: auto; background: var(--paper-2); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 34px; }
.footer-grid h5 { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 12px; }
.footer-grid a { display: block; color: var(--ink-2); font-size: .89rem; padding: 4px 0; }
.footer-grid a:hover { color: var(--accent); }
.footer-about { max-width: 320px; color: var(--ink-3); font-size: .89rem; margin-top: 11px; line-height: 1.55; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  margin-top: 38px; padding-top: 20px; border-top: 1px solid var(--line); font-size: .82rem; color: var(--ink-3); }
.footer-bottom .mono { font-family: var(--font-mono); font-size: .76rem; }

/* =============================================================================
   Responsive
   ========================================================================== */
@media (max-width: 940px) {
  .browse { grid-template-columns: 1fr; }
  .filters { position: static; display: none; }
  .filters.is-open { display: block; margin-bottom: 24px; }
  .detail { grid-template-columns: 1fr; }
  .detail__side { position: static; }
  .auth { grid-template-columns: 1fr; }
  .auth__aside { display: none; }
  .compare { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-stats .s:nth-child(2) { border-right: none; }
  .hero-stats .s:nth-child(1), .hero-stats .s:nth-child(2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 720px) {
  .wrap { padding-inline: 18px; }
  .nav { display: none; position: absolute; top: 58px; left: 0; right: 0; flex-direction: column;
    background: var(--paper); border-bottom: 1px solid var(--line); padding: 10px; gap: 1px; }
  .nav.is-open { display: flex; }
  .nav a { width: 100%; }
  .nav a.is-active::after { display: none; }
  .nav-toggle { display: grid; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
  .lesson-row { grid-template-columns: 36px 1fr; }
  .lesson-row__time { display: none; }
}